Struct MapErr 

pub struct MapErr<F, S, E> { /* private fields */ }

Service for the map_err combinator, changing the type of a service’s error.

This is created by the ServiceExt::map_err method.

Trait Implementations

impl<F, S, E> Clone for MapErr<F, S, E>

where F: Clone, S: Clone,

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<F, S, E> Debug for MapErr<F, S, E>

where S: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<F, S, St, Req, E> Service<St, Req> for MapErr<F, S, E>

where S: Service<St, Req>, F: Fn(S::Error) -> E,

type Res = <S as Service<St, Req>>::Res

Responses that the service could provide.

type Error = E

Errors produced by the service while checking readiness or executing a call.

async fn call(&self, req: Req, ctx: Ctx<'_, Self, St>) -> Result<S::Res, E>

Processes a request and asynchronously returns the response.

async fn ready(&self, ctx: Ctx<'_, Self, St>) -> Result<(), E>

Returns when the service is ready to process requests.

async fn shutdown(&self, ctx: Ctx<'_, Self, St>)

Shuts down the service.

fn map<F, Res>(self, f: F) -> ServiceChain<Map<F, Self, Res>, St, Req>

where Self: Sized, F: Fn(Self::Res) -> Res,

Maps this service’s output to a different type, returning a new service.

fn map_err<F, E>(self, f: F) -> ServiceChain<MapErr<F, Self, E>, St, Req>

where Self: Sized, F: Fn(Self::Error) -> E,

Maps this service’s error to a different type, returning a new service.

fn and_then<Next, F>(self, f: F) -> ServiceChain<AndThen<Self, Next>, St, Req>

where Self: Sized, Next: Service<St, Self::Res, Error = Self::Error>, F: IntoService<Next, St, Self::Res>,

Call another service after call to this one has resolved successfully.

fn pipeline(self, st: St) -> Pipeline<Req, Self::Res, Self::Error>

where Self: Sized + 'static, St: 'static, Req: 'static,

Wraps it in a container.